常州市典型臭氧污染天气过程及成因分析研究

臭氧是一种存在于地球臭氧层和近地面的气体，它对人类和环境是否有益取决于大气中存在的位置。高空臭氧层使人类免受紫外线伤害，而近地面臭氧是光化学烟雾产生的主要污染物，损害农作物、树木和其他植物生长，危害人体健康诱发儿童哮喘等疾病。本文结合2013年8月12日常州市出现的臭氧污染天气，利用气象和空气自动监测数据，对污染过程、变化特征和成因进行了分析。结果表明，在连续高温、太阳辐射强度大、风速低、大气扩散条件差等气象因素和臭氧前体物（NMHC）较高等不利条件下，易形成臭氧污染天气，导致空气质量下降。

Analysis on Typical Case and Cause of Ozone Pollution Phenomena in Changzhou

Ozone exists in both upper atmosphere and ground surface. Ozone can benefit and harm people＇s health and the en vironment, depending on its location in the atmosphere. The stratosphere protects life on earth from the sun＇s harmful ultraviolet （UV） rays. Surface - level or ＂bad＂ ozone is a pollutant that poses significant health risk, especially for children with asthma. It also damages crops, trees and other vegetation. It is a main ingredient of urban smog. By using auto - monitored air quality data and meteorologically data, the cause and variation characteristics of ozone pollution on 12th August 2013 in Changzhou are ana lyzed. Results indicate that the ozone concentration would exceed standard and result in bad air quality on the condition of contin uous high temperature, strong solar radiation, low wind speed, bad atmospheric diffusion, and high NMHC concentration.